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Frequency is the rate of repetitive aspect in the amplitude over a given dimension.
1
vote
Is the electromagnetic spectrum bounded somehow?
Which gives maximum frequency to be 6.187356e34 Hz.
Plank length - Wikipedia …
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How to increase the frequency of light
There is a general way to increase the frequency of light. It is Doppler Effect.
You can keep the observer (target for photoelectrons) and move the source of light towards it. … But it is not practical, because you will need very high relative velocity to have any considerable change in the frequency. …